ZHANG Xian-zhong,DAI Xiao-hu.Effect of PSFS Process Transformation on Characteristics of Thicked Sludge and Its Dewatering Performance[J].China Water & Wastewater,2020,36(17 17):18-22.
Effect of PSFS Process Transformation on Characteristics of Thicked Sludge and Its Dewatering Performance
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
17 17
Page:
18-22
Column:
Date of publication:
2020-09-01
- Keywords:
- thicked sludge; plant-sludge-film symbiosis(PSFS) process; dissolved organic matter; dewatering conditioning
- Abstract:
- A wastewater treatment plant in Shanghai has been transformed by plant-sludge-film symbiosis(PSFS) process. Through the analysis of thicked sludge properties and dewatering indexes, the effect of PSFS process on characteristics of thicked sludge was investigated. Main indicators of thicked sludge dewatering performance including specific resistance and capillary water absorption time were reduced after PSFS process transformation, indicating that dewaterability of the sludge was improved. Dissolved organic matters in sludge concentrate supernatant were characterized by ultraviolet-visible spectroscopy and three-dimensional fluorescence spectroscopy. After PSFS process transformation, the sludge had a more abundant microbial community structure, higher humification degree and lower biodegradability. Different kinds of conditioners were selected to condition the dewatering performance of the thicked sludge. It was found that the sludge before transformation was suitable to be conditioned by CPAM with macromolecule, branched chain structure and moderate cationic degree. However, the sludge after transformation was suitable to be conditioned by CPAM with moderate molecular, linear structure and high cationic degree.
Last Update:
2020-09-01